Sodium compound of dioxy-diamino-arseno-benzol-dihydrochlorid



Unrrnn srn'rs UMETARO SUZUKI,

OF TOKYO, JAPAN.

SODIUM; COMPOUND OF DIOXY-DIAMINO-ARSENO-BENZOL-DIHYDBOCHLQRID.

No Drawing.

T 0 all whom it may concern:

Be it known that I, UME'TARo St atum, subJect of the Emperor of Japan, residing at Tokyo, have made a certain newand useful invention in Sodium Compound of Dioxy Diainino -Arseno Benzol Dihydro chlorid. and Process of Making the Same, of which the following is a specification.

This invention relates to sodium compound of dioxy-dia1ninoarseno-benzol-dihyv drocl'ilorid, and the process of making the same. Y

The objectof the invention is to improve the commercial product known as salvarsan? (dioxy-diamino-arseno-benzol-dihydro chlorid) so as to removethe danger and disadvantages attending the use of said product. Salvarsan (C,H (N I-I (OH)As) 2HClis an acid and cannot be used in its original .form. Previous to its use it ought to be- :treated. with an alkali.

to be carried out with greatcaution as both an excessive, as'wellfas an nsufiicient quantityv of the latter causes pain to patients This is one of the disadvantages salvarsan has and. therefore therehas been a constant dation, and is thereby a strong poison that it patient treated with same.

effort to remove this Was partially successful in the discovery of neo-salvarsan. The latter can be use rectly without any such previous treatment which as above pointed'out demands a great deal of skill and caution; It is, however, less effective in its healing action than the original salvarsan. The efiort itO find a substance .Which is as effectiveas salvarsan, and which can be used without previous cautious treatment,- has been thus far ,unsuccessful. Thefpresent invention relates paring same.

Salvarsan tage'. When it is is readyfor use, it is treated with alkali and liable to. rapid oxiconverted into such may be fatal to the This naturally.

renders necessary the "preliminary cautious treatment of salvarsan v With an alkali'each timedirectly before use, in order to prevent the most serious eiiect of poisoning on account of partially oxidized. salvarsan so'lu-- 'tion. In other Words, salva-rsan cannot be Specification of Letters Patent.

This treatment has it harmful.

defect and this efi'ort has anothers'e'rious disadvanfum desiccator.

" p18, is from preserved in a torm ready for use because of its great instability and rapid oxidation. It is among the special objects of the present invention to provide a substance and method of preparing the same which excludes such danger and which can be preserved 1n a torinready for use, and which is as effective as salvarsan in its healing ac tion.

In carryinggo'ut my invention Ita'ke resulting clear yellow solution is added sodiuni ethylate, .or sodium methylate solution (which may be prepared, for example,

Patented Feb. 10, 1920. Appfication filed June 7, 1916. Serial No. 102,31f7.

by dissolving l grams of metallic sodium in '100 c. c. of absolute ethyl alcohol or methyl alcohol, respectively), to the extent, in .the

example stated, of 24 to 25 c. c. The resultingthick brownish-yellow precipitate at -first produced partly dissolves again by the further addition of the sodium ethylate, or sodium inethylatesolution, as the case may be. In order to ascertain whether or not a suilicient quantity of the sodium ethylate, or of the sodium IHGlJllYliltfihfiS been used a few drops of the liquid are added to 3 to 5 c. c. of water. If the liquid does not dissolve quite. clear a little more of the sodium cthylate, or sodium methylate solution is added to the methyl alcohol solution.

- Care, of course, must be exercised to avoid an excess of sodium ethyl-ate, or sodium -rnethylate solution. The whole liquid is then poured into ether, for example 500 c. 0.,

'into which ethyl alcohol, say '30 .to' 50 o. c.

has been added" and Well mixed by shaking or otherw1se The, resulting yellowish brown precipitate is then removed by filtrasuitably dried,

I The yield of sodiumv comthus obtained, employing the quantipound the above examties of materials given in 5to 6 grams.

. In order to avoid the possibility compound containing noxious or poisonous oxidation products which the presence of even slight quantities of oxygen may pro- I duce, the vhole process should he carried of the .tion or otherwise, is Washed with ether and as, for instance, 1n a vacu-f out in a current or an atmosphere of nonethyl alcohol, and acetone.

gas.

-is also soluble in methyl oxidizing gas such as hydrogen or nitrogen The resulting sodium compound, prepared and produced 111 the manner and accordingto the process above set forth, is

an amorphous yellowish brown powder,

soluble in water. or in physiological salt solution with a resulting light yellow color, and having a slightly alkaline reaction. It alcohol but is ether petroleum, ether, The arsenic c'ontent .of the compound is about 22% to The sodium compound produced as described, not being an acid does not require neutralization but can be used directly, when dissolved in wateror physiological salt as an injection, and can be preserved indefinitely in a form in which it iscapable of direct use without danger of the formation of noxious or poisonous substances through oxidation.

Having now set forth the objects and na ture of my invention, what I claim as new and useful and of my own invention, and desire to secure by Letters Patent,is-

1. The process of manufacturing sodium COIHPOHHClS of -dioXy-diamino-arseno-benzoldihydrochlorid, which consists in mixing a solution of the (llOXY-(llillHl110*2LlS110-l)8I1- zol-dihydrochlorid with an alkaline solution containing a sodium compound, and precipitating and recovering the resulting sodium compounds.

nearly insoluble in 2. The process which consists in addinga' solution of sodium ethylate or sodium methylate to an alcoholic solution of dioxy-diamino arseno benzol dihydrochlorid and precipitating and recovering the resulting sodium compounds therefrom.

3. The process-which consists in adding alcoholic solution of sodium alcoholate to a solution of dioxy-diamlno-arsenorbenzol-di-.'

from.

and precipitating and recoverhydrochlorid resulting sodium compounds there-v ing the i. The methyl alcohol solution of a metallic sodium compound to a methyl alcoholic solution of dioxy-d'iamino-arseno-benzol-dihydrochlorid and precipitating and recovering the resulting sodium compounds therefrom.

The process of manufacturing sodium compounds of dioXy-diamino-arseno-benzoldihydrochlorid' which consists in mixing a solution'of sodium alcoholate with a solution of dioxy-diamino-arseno-benzol-dihy-,

drochlorid and then precipitating the resulting sodium compounds by adding'ether to said solution.

(i. The process which consists in n'iixing a solution of dioxy-diamino-arseno benzol-dihydrochlorid with a solution. containing a sodium compound, and precipitating and recovering frointlie liquid the resulting so dium compounds, the application being carried out in anatmosphere of nonoxidizing gas.

7. The process which consists in adding alcoholic solution of sodium methylate to' methyl alcoholic solution of dioxy-dian'iinoarseno-benzol-dihydrochlorid and precipitating and recovering the resulting sodium compounds therefrom.

8; The process which-consists in mixing a solution of diolvy-diamino-arseno-benzoldihydrochlorid with a solution containing a sodium compound, and precipitating and recovering from the liquid the resulting sodium compounds.

In testimony whereof I aflix my signature in presence of two witnesses.

UMETARO SUZUKI. \Vitnesses:

S. NAKANo, S. HORIZA.

process which consists in adding 

